diff --git a/tecs/didi b/tecs/didi
index 4fb7b70..5590153 100755
--- a/tecs/didi
+++ b/tecs/didi
@@ -13,6 +13,7 @@ tasp@tasp:tecs/ dmc@dmc:tecs/ hrpt@hrpt:tecs/ \
 morpheus@morpheus:tecs/ sans@sans:tecs/ sans2@sans2:tecs/ \
 type@darwin \
 macosx=/afs/psi.ch/project/sinq/mac_os/stow/tecs/bin/ \
+admin@ldmprep1:bin/ admin@ldmprep2:bin/ \
 )
 
 set dests=""
diff --git a/tecs/make_gen b/tecs/make_gen
index b06a83a..6e5d190 100644
--- a/tecs/make_gen
+++ b/tecs/make_gen
@@ -10,7 +10,7 @@
 
 LIBR_OBJ  =coc_util.o myc_err.o myc_str.o myc_buf.o myc_time.o
 SERV_OBJ  =tecs.o coc_server.o tecs_lsc.o tecs_serial.o coc_logfile.o \
-           tecs_data.o $(LIBR_OBJ)
+           tecs_data.o tecs_logger.o $(LIBR_OBJ)
 CLI_OBJ   =tecs_cli.o coc_client.o $(LIBR_OBJ)
 TCLI_OBJ  =sys_getenv.o sys_env.o myc_tmp.o sys_cmdpar.o \
            sys_date.o sys_wait.o sys_lun.o sys_rdline.o \
diff --git a/tecs/tecs.c b/tecs/tecs.c
index db1d259..4e91139 100644
--- a/tecs/tecs.c
+++ b/tecs/tecs.c
@@ -5,6 +5,9 @@
 #include <signal.h>
 #include <string.h>
 #include <ctype.h>
+#include <unistd.h>
+#include <sys/types.h>
+#include <sys/stat.h>
 #include "myc_mem.h"
 #include "myc_err.h"
 #include "coc_util.h"
@@ -14,6 +17,7 @@
 #include "myc_time.h"
 #include "tecs_lsc.h"
 #include "tecs_data.h"
+#include "logger.h"
 
 /* --- non ANSI signal --- */
 #ifndef SIGPIPE
@@ -28,6 +32,7 @@
 static SerChannel *ser=NULL;
 static char binDir[256]="";
 static char logDir[256]="";
+static char loggerDir[256]="";
 static int logIt=0, use_stdout=0;
 static char serverId[32]="tecs";
 static int msecTmo=5000;
@@ -170,7 +175,7 @@ static int
   lockAlarm,
   cntError;
 
-int tim, rdTim; /* actual time, read Time */
+static int tim, rdTim; /* actual time, read Time */
 
 static int decod[8]={21,20,17,16,5,4,1,0}; /* for code conversion */
 
@@ -2777,7 +2782,6 @@ int LogfileHdl(int mode, void *base, int fd) {
   return 0;
 }
 
-
 int ExecuteRequest(void) {
   if (readTemp) ERR_I(ReadTemp());
   ERR_I(CocCallHandlers());
@@ -3003,6 +3007,7 @@ int main(int argc, char *argv[]) {
   CocDefStr(serverId, RW); CocHdl(LogfileHdl);
   CocDefInt(logIt, RW); CocHdl(LogfileHdl);
   CocDefStr(logDir, RW); CocHdl(LogfileHdl);
+  CocDefStr(loggerDir, RW);
   CocDefStr(binDir, RW);
 
   logfileOut(LOG_MAIN ,"%s ", argv[0]);
@@ -3029,6 +3034,9 @@ int main(int argc, char *argv[]) {
       } else if ('d'==opt) {
         i++;
         str_copy(logDir, argv[i]);
+      } else if ('m'==opt) {
+        i++;
+        str_copy(loggerDir, argv[i]);
       } else if ('t'==opt) {
         i++;
         msecTmo=atoi(argv[i]);
@@ -3064,9 +3072,36 @@ int main(int argc, char *argv[]) {
   str_copy(statusBuf, "starting up");
   logfileStatusBuf(statusBuf);
 
-  str_copy(buf, logDir);
-  str_append(buf, serverId);
+  if (logDir[0] == '/') {
+    str_copy(buf, logDir);
+  } else {
+    getcwd(buf, sizeof buf);
+    str_append(buf, "/");
+    ERR_I(str_append(buf, logDir));
+  }
+  ERR_I(str_append(buf, serverId));
+  if (strcmp(serverId, "tecs") != 0) {
+    ERR_I(str_append(buf, "/tecs"));
+  }
   logfile=logfileInit(buf, logIt, use_stdout, logIt && use_stdout);
+  
+  if (loggerDir[0] != '\0') {
+    if (loggerDir[0] == '/') {
+      str_copy(buf, loggerDir);
+    } else {
+      getcwd(buf, sizeof buf);
+      str_append(buf, "/");
+      ERR_I(str_append(buf, loggerDir));
+    }
+    if (strcmp(serverId, "tecs") != 0) {
+      ERR_I(str_append(buf, serverId));
+      mkdir(buf, S_IRWXU+S_IRGRP+S_IXGRP+S_IROTH+S_IXOTH);
+      /* do not check return value */
+    }
+    str_copy(loggerDir, buf);
+    LoggerSetDir(loggerDir);
+  }
+
   CocDefStr(logfile, RD);
   logfileOut(LOG_MAIN ,"\n");
   logfileWrite(logMask);
diff --git a/tecs/tecs_data.c b/tecs/tecs_data.c
index 13f2e89..deb2f19 100644
--- a/tecs/tecs_data.c
+++ b/tecs/tecs_data.c
@@ -8,6 +8,7 @@
 #include "myc_time.h"
 #include "coc_logfile.h"
 #include "tecs_data.h"
+#include "logger.h"
 
 #define RUN_SIZE 1024
 #define SET_LEN 1024
@@ -34,6 +35,7 @@ typedef struct _Set {
   float *var;
   Run *runs;
   Summary sum;
+  Logger *log;
 } Set;
 
 typedef struct {
@@ -125,6 +127,7 @@ Set *CreateSet(Base *base, char *name, float *var, int step, int lifetime, int s
   s->start = start;
   s->step = step;
   s->var = var;
+  s->log = LoggerMake(name, step, 0);
   ResetSum(&s->sum);
   return s;
   OnError:
@@ -267,7 +270,8 @@ int DataPut(DataSet *set, int time, float value) {
 
 int DataPutAll(DataBase *base, int time) {
   Set *s;
-
+  char value[32];
+  
   if (base == NULL) {
     s=database.head;
   } else {
@@ -276,6 +280,14 @@ int DataPutAll(DataBase *base, int time) {
   while (s!=NULL) {
     if (s->var!=NULL) {
       ERR_I(Put(s, time, *s->var));
+      if (s->log != NULL) {
+        if (*s->var == DATA_UNDEF) {
+          value[0]='\0';
+        } else {
+          snprintf(value, sizeof value, "%.5g", *s->var);
+        }
+        LoggerWrite(s->log, mycUnixTime(time), s->step, value);
+      }
     }
     s=s->next;
   }